| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | T. Rowe Price Investment Management,Inc. | 30.79M (18.69%) | 10.38M Increased by +33.70% | Mar 31, 26 |
| 2 | HHG PLC | 13.65M (8.28%) | -240.35K Decreased by -1.76% | Mar 31, 26 |
| 3 | BlackRock Inc | 11.70M (7.10%) | 509.03K Increased by +4.35% | Mar 31, 26 |
| 4 | Vanguard Group Inc | 11.22M (6.81%) | 1.46M Increased by +12.97% | Dec 31, 25 |
| 5 | RA Capital Management, LLC | 9.71M (5.90%) | 0.00 Increased by 0.00% | Jun 30, 25 |
| 6 | Atlas Venture Life Science Advisors, LLC | 9.13M (5.54%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 7 | FMR Inc | 8.91M (5.41%) | 2.34M Increased by +26.26% | Mar 31, 26 |
| 8 | Orbis Allan Gray Ltd | 6.76M (4.10%) | 1.96M Increased by +28.99% | Mar 31, 26 |
| 9 | State Street Corp | 6.65M (4.04%) | -39.00K Decreased by -0.59% | Mar 31, 26 |
| 10 | Vanguard Capital Management, LLC | 6.41M (3.89%) | 6.41M Increased by +100.00% | Mar 31, 26 |
| 11 | Adage Capital Partners Gp LLC | 5.17M (3.14%) | 1.62M Increased by +31.28% | Dec 31, 25 |
| 12 | Perceptive Advisors LLC | 4.67M (2.83%) | 1.19M Increased by +25.49% | Mar 31, 26 |
| 13 | FCPM III SERVICES BV | 4.64M (2.82%) | -818.46K Decreased by -17.62% | Mar 31, 26 |
| 14 | TCG Crossover Management, LLC | 4.62M (2.80%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 15 | State Street Corporation | 4.19M (2.55%) | 1.86M Increased by +44.27% | Mar 31, 24 |
| 16 | Vanguard Portfolio Management, LLC | 4.16M (2.53%) | 4.16M Increased by +100.00% | Mar 31, 26 |
| 17 | Vestal Point Capital LP | 4.00M (2.43%) | 3.88M Increased by +97.00% | Mar 31, 26 |
| 18 | Geode Capital Management, LLC | 3.50M (2.13%) | 240.69K Increased by +6.87% | Mar 31, 26 |
| 19 | Citadel Advisors Llc | 3.41M (2.07%) | 2.47M Increased by +72.35% | Sep 30, 25 |
| 20 | BRAIDWELL LP | 3.27M (1.99%) | -348.00K Decreased by -10.63% | Jun 30, 25 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | T. Rowe Price US Small-Cap Core Equity | 7.01M (4.26%) | 1.57M Increased by +22.45% | Mar 31, 26 |
| 2 | T. Rowe Price Small-Cap Stock | 7.01M (4.25%) | -4.99K Decreased by -0.07% | Apr 30, 26 |
| 3 | Vanguard Total Stock Mkt Idx Inv | 4.71M (2.86%) | 59.41K Increased by +1.26% | Apr 30, 26 |
| 4 | T. Rowe Price Small-Cap Value | 4.62M (2.81%) | -2.88K Decreased by -0.06% | Apr 30, 26 |
| 5 | T. Rowe Price Instl Small-Cap Stock | 3.81M (2.31%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 6 | State Street® SPDR® S&P® Biotech ETF | 3.81M (2.31%) | -23.41K Decreased by -0.62% | May 31, 26 |
| 7 | Fidelity Growth Compy Commingled Pl S | 3.55M (2.15%) | 603.16K Increased by +17.00% | Apr 30, 26 |
| 8 | T. Rowe Price U.S. SC Core Eq Tr-D | 3.38M (2.05%) | 819.54K Increased by +24.25% | Mar 31, 26 |
| 9 | T. Rowe Price Capital Appreciation | 3.28M (1.99%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 10 | iShares Russell 2000 ETF | 3.19M (1.94%) | 29.48K Increased by +0.92% | May 29, 26 |
| 11 | T. Rowe Price U.S. SC Value Eq Tr-D | 3.00M (1.82%) | 1.43M Increased by +47.63% | Mar 31, 26 |
| 12 | Fidelity Growth Company Fund | 2.67M (1.62%) | 473.90K Increased by +17.76% | Apr 30, 26 |
| 13 | Vanguard US Total Market Shares ETF | 2.65M (1.61%) | 2.40K Increased by +0.09% | Sep 30, 24 |
| 14 | Janus Henderson Global Life Sciences | 2.53M (1.53%) | 7.97K Increased by +0.32% | Mar 31, 26 |
| 15 | Janus Henderson Global Life Sciences D | 2.53M (1.53%) | 15.02K Increased by +0.59% | Mar 31, 26 |
| 16 | Janus Global Life Science AUSD | 2.33M (1.41%) | 153.63K Increased by +6.60% | Mar 31, 26 |
| 17 | Janus Henderson Glb Life Scn I2 USD | 2.32M (1.41%) | -9.07K Decreased by -0.39% | Apr 30, 26 |
| 18 | JPMorgan Small Cap Growth A | 1.94M (1.18%) | 496.51K Increased by +25.56% | Jul 31, 25 |
| 19 | Fidelity Select Biotechnology | 1.88M (1.14%) | -80.80K Decreased by -4.29% | Apr 30, 26 |
| 20 | Fidelity Growth Compy Commingled Pl O | 1.79M (1.08%) | 348.61K Increased by +19.51% | Aug 31, 24 |